corns and bps in the same rack?

[Kaorte]

I use the bottom shelfs in my racks for the colubrids. They generally stay much cooler, probably 7-8 degrees cooler. Which is too cool to use for Ball Pythons; however, it does allow for proper thermoregulation for certain species of colubrids .

Do you just put them on the bottom shelf because it is cooler? Or do you set the temp lower?